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28 Chapter 2 Installation
ACTURA Flex 48330 Power System User Manual
Note
The actual number of battery circuit breakers in MFU may be 0~5 according to the user’s
need.
Non-standard configuration
The DC power system with non-standard configuration has a BCU. The connection
of positive cables is the same with that of the system with standard configuration.
The only difference is that there are five positive battery cables because the system
has five battery strings. One end of positive battery cable is connected to the
neutral bus of the DC power cabinet. Another end of the positive battery cable is
connected to the positive terminal of the battery string in each level as shown in
Figure 2-17.
One end of negative battery cable is connected to the negative terminal of the
battery string in each level as shown in Figure 2-17. Another end is connected to
the BCU as shown in Figure 2-18. The connection has already been done in
factory.
Negative Battery Cables(Blue)
Figure 2-18 Negative battery cables connection in BCU
Note
1. Before connecting the battery cables, the corresponding battery fuse or the battery switch
must be disconnected.
2. Be careful not to reverse connect the battery, otherwise, the battery and the power supply
system will be damaged!
Since the battery voltage decreases in discharge, hence the sectional area of the
cable connecting the battery and the MFU or BCU should be relatively big to keep
the voltage drop on the cable within 0.5V.